PN 9001024
Rev. B Jan. 2000
Page 4-13
SATO CL608 & CL612 SERVICE MANUAL
SECTION 4 – Electrical Checks and Adjustments
4-9 Ribbon Sensor Adjustment
Additional equipment required: TP Test Module
Digital Multimeter
STEP PROCEDURE
Refer to Section 4-2 for access to main PCB
1. Turn VR4 potentiometer on the main PCB all the way to the right.
Fig. 4-16
2. Set the digital multimeter to DC voltage measurement mode.
Refer to Fig. 4-17 & 4-18. Refer also to Section 4-3. Attach the
connector from the TP Test Module to the test port on the main PCB.
Note correct positioning of connector. Set the dial to 7.
3. Connect (+) probe of the multimeter to Sig+ and (-) probe to pin
GND.
4. Refer to Section 1-6 to locate the ribbon sensor. For Low level
adjustment, rotate the ribbon unwind shaft to align one of the "slots"
with the sensor. Then adjust the electrical level with VR4 on the main
PCB so that it will measure +0.5 V or less.
5. For High level adjustment, rotate the ribbon unwind shaft to align one
of the "tabs" with the sensor. Check the electrical level. If the level
difference is + 2.0 V more than the Low level, it is acceptable. If not,
return to STEP 4 and readjust.
6. Standard values: Low level (slot): +0.5 V or less.
High level (tab): Low level +2.0 V or higher
NOTE: Adjust low level to achieve the biggest difference between each
level by repeating the process If these values do not result, try the
following:
a) Repeat the process
b) Clean the sensor
c) Replace the sensor
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